Liya 3.0.4 does Chinese and UTF8 better

Bug fix: Custom SQL Command field didn't allow the use of the Character Input Menu, e.g., to choose Pinyin to enter Chinese characters into the SQL query string. This has been fixed.

Made MySQL connections work more like PostgreSQL connections, in terms of the choice of character set used. The character set used in each connection to the database follows that of the database. If at the point of the connection, no database has been chosen, then the connection defaults to using UTF8. New databases in Liya are created using UTF8 as the default character set.

Also fixed a crash while importing and exporting databases that occurred after version 3.0.3, when Liya was made to be Sandbox-compliant.